首页|When quantum dots meet blue phase liquid crystal elastomers:visualized full-color and mechanically-switchable circularly polarized luminescence

When quantum dots meet blue phase liquid crystal elastomers:visualized full-color and mechanically-switchable circularly polarized luminescence

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  • 国家科技期刊平台
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  • NSTL
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Polymer-based circularly polarized luminescence(CPL)materials with the advantage of diversified structure,easy fabrication,high thermal stability,and tunable properties have garnered considerable attention.However,adequate and precise tuning over CPL in polymer-based materials remains challenging due to the difficulty in regulating chiral structures.Herein,visualized full-color CPL is achieved by doping red,green,and blue quantum dots(QDs)into reconfigurable blue phase liquid crystal elastomers(BPLCEs).In contrast to the CPL signal observed in cholesteric liquid crystal elastomers(CLCEs),the chiral 3D cubic superstructure of BPLCEs induces an opposite CPL signal.Notably,this effect is entirely independent of photonic bandgaps(PBGs)and results in a high glum value,even without matching between PBGs and the emission bands of QDs.Meanwhile,the lattice structure of the BPLCEs can be reversibly switched via mechanical stretching force,inducing on-off switching of the CPL signals,and these variations can be further fixed using dynamic disulfide bonds in the BPLCEs.Moreover,the smart polymer-based CPL systems using the BPLCEs for anti-counterfeiting and information encryption have been demonstrated,suggesting the great potential of the BPLCEs-based CPL active materials.

Shan Li、Yuqi Tang、Qingyan Fan、Ziyuan Li、Xinfang Zhang、Jingxia Wang、Jinbao Guo、Quan Li

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Key Laboratory of Carbon Fibers and Functional Polymers,Ministry of Education,and College of Materials Science and Engineering,Beijing University of Chemical Technology,100029 Beijing,China

Institute of Advanced Materials and School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China

Materials Science Graduate Program,Kent State University,Kent,OH 44242,USA

CAS Key Laboratory of Bio-Inspired Materials and Interfacial Sciences,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,100190 Beijing,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJiangsu Innovation Team ProgramFundamental Research Funds for the Central Universities

5207301751773009

2024

10.1038/s41377-024-01479-1

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(6)